WO2012041045A1 - Procédé de localisation et serveur de localisation - Google Patents

Procédé de localisation et serveur de localisation Download PDF

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Publication number
WO2012041045A1
WO2012041045A1 PCT/CN2011/072057 CN2011072057W WO2012041045A1 WO 2012041045 A1 WO2012041045 A1 WO 2012041045A1 CN 2011072057 W CN2011072057 W CN 2011072057W WO 2012041045 A1 WO2012041045 A1 WO 2012041045A1
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WIPO (PCT)
Prior art keywords
base station
serving base
terminal
distance
positioning
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PCT/CN2011/072057
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English (en)
Chinese (zh)
Inventor
单良
Original Assignee
中兴通讯股份有限公司
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Publication of WO2012041045A1 publication Critical patent/WO2012041045A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W64/00—Locating users or terminals or network equipment for network management purposes, e.g. mobility management
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S5/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
    • G01S5/02—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations using radio waves
    • G01S5/14—Determining absolute distances from a plurality of spaced points of known location
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/02—Services making use of location information
    • H04W4/023—Services making use of location information using mutual or relative location information between multiple location based services [LBS] targets or of distance thresholds

Definitions

  • the present invention relates to mobile communication technologies, and in particular, to a positioning method and a positioning server. Background technique
  • the positioning service has always been considered as a bright spot for future mobile value-added services.
  • major mobile communication operators in countries and regions such as North America, Europe, Asia Pacific, Japan and South Korea have already opened positioning services.
  • Positioning is one of the most attractive businesses in mobile value-added services and one of the most complex in all aspects of the industry chain.
  • the positioning technology in the mobile communication system refers to measuring certain parameters in the received radio waves, such as transmission time, amplitude, phase, and Angel of Arrival (AOA), and calculating by using a specific algorithm, thereby Determine the position of the measured object.
  • FCC Federal Communications Commission
  • 3GPP the 3 rd Generation partnership Project
  • WiMAX worldwide Interoperability for microwave access
  • OMAX open mobile Alliance
  • OMA open mobile Alliance
  • LCS location service
  • GPS Global Positioning System
  • A-GPS assisted GPS
  • both the network and the terminal are required to receive GPS signals.
  • the terminal is located in combination with the base station information and the GPS information; the positioning response time of the A-GPS is greatly shortened compared to the GPS, and since the A-GPS can be in a dormant state during the two positioning pauses, the energy consumption of the terminal can be reduced.
  • the method of positioning using A-GPS can be applied to various mobile networks, such as 2G, 3G, CDMA, WiFi, WiMAX, etc.; however, the disadvantage of using A-GPS is that it is necessary to perform hardware and software transformation on the terminal and the network side simultaneously.
  • the performance of indoor positioning is still low, and multiple network transmissions (up to six one-way transmissions) also occupy a lot of space resources. Therefore, the application of positioning using A-GPS is limited by the following conditions:
  • the market share of the terminal with A-GPS function is not high, and it is necessary to realize positioning in an environment where the satellite receives a good signal, so it is necessary to use other Positioning technology complements it.
  • Commonly used positioning technologies include: Cell ID (ID-ID), Enhanced Cell ID, Time of Arrival (TOA), Time Difference of Arrival (TDOA), AOA, and field strength fingerprinting.
  • ID-ID Cell ID
  • TOA Time of Arrival
  • TDOA Time Difference of Arrival
  • AOA AOA
  • field strength fingerprinting a feature that is common to the global system for Mobile communications.
  • U-TDOA Uplink Time Difference of Arrival
  • the positioning technique using downlink measurement parameters has various implementation forms in different networks, such as Enhanced Forward Link Trangulation (EFLT) technology in CDMA networks, because existing wireless is used.
  • Measurement parameters without the need to add special measurement functions to the terminal, so they are used more frequently; for example, Enhanced Observed Time Difference (E-OTD) in 2G and Observed Time Difference in 3G (OTDOA, Observed Time Difference) Of Arrival ), due to the need for the terminal to support specialized measurement parameters, the application is subject to many restrictions.
  • E-OTD Enhanced Observed Time Difference
  • OOA Observed Time Difference
  • the application is subject to many restrictions.
  • the AOA and field strength fingerprint positioning techniques mentioned above are also rarely used because of the low cost performance.
  • this multi-base station triangulation technology is to first estimate the distance or distance difference between the terminal and multiple base stations, and substitute the coordinates of the known base station and the coordinates of the unknown terminal into the circular curve or hyperbolic equations, and finally calculate The coordinates of the terminal as an unknown number.
  • the premise of obtaining higher positioning accuracy in this way is that a sufficient number of measured value parameters are needed first, otherwise the calculation function cannot be performed due to insufficient number of equations; secondly, the error of the measured parameters needs to be within a certain range. Otherwise, it is very likely that the calculation result cannot be obtained or the error of the calculation result is large, even lower than the positioning accuracy obtained by using only the Cell-ID positioning technology at the same position; further, since it is usually used in the above positioning technology Multi-base station triangulation technology, and the accuracy of the calculation method of this technology is closely related to the geometrical distribution of the reference point, which is subject to the so-called geometric precision attenuation factor (GDOP, Geometric Dilution of Precision) or horizontal singularity factor (HDOP).
  • GDOP geometric precision attenuation factor
  • HDOP horizontal singularity factor
  • the main object of the present invention is to provide a positioning method and a positioning server to more accurately implement positioning estimation of a terminal.
  • the invention discloses a positioning method, which comprises:
  • the single base station positioning technology is used to calculate the position estimation of the terminal.
  • the method before the calculating the location estimation of the terminal by using the single base station positioning technology, the method includes:
  • the method further includes:
  • the method further includes:
  • the multi-base station triangulation technology is used to calculate the terminal location estimation.
  • the determining whether there is a distance between the at least one neighboring base station and the serving base station is less than or equal to a preset base station distance threshold is:
  • the determining whether the terminal is close to the serving base station is:
  • the terminal is close to the serving base station. distance.
  • the determining whether the terminal is close to the serving base station is:
  • the signal level of the serving base station determines whether the terminal is close to the serving base station.
  • the determining whether the terminal is close to the serving base station is:
  • the terminal is close to the serving base station.
  • the location estimation of the terminal by using the single base station positioning technology is: adding the identifier of the existing serving base station in the system to the parameter related to the serving base station in the positioning measurement information and the pre-entered serving cell in the system. Related data, get the location estimate of the terminal.
  • the present invention also discloses a positioning server, comprising: a determining module, a first computing module; wherein
  • the determining module is configured to separately calculate a distance between each neighboring base station and the serving base station, and determine whether there is a distance between the at least one neighboring base station and the serving base station is less than or equal to a preset base station distance threshold; when all neighboring base stations When the distance between the serving base station and the serving base station is greater than the preset base station distance threshold, it is determined whether the terminal is close to the serving base station;
  • a first calculating module configured to: when the determining module determines that the distance between the at least one neighboring base station and the serving base station is less than or equal to a preset base station distance threshold, or when the determining module determines the relationship between all neighboring base stations and the serving base station The distance is greater than the preset base station distance threshold, and the terminal is When the serving base stations are close to each other, the single base station positioning technology is used to calculate the position estimation of the terminal.
  • the above positioning server further includes:
  • a second calculating module configured to: when the determining module determines that the distance between all neighboring base stations and the serving base station is greater than a preset base station distance threshold, and the terminal and the serving base station are not close to each other, using multi-base station triangulation The location estimate of the technical computing terminal.
  • the positioning method and the positioning server provided by the present invention when there is a distance between at least one neighboring base station and the serving base station is less than a preset base station distance threshold, or when the distance between all neighboring base stations and the serving base station is greater than a preset
  • the single base station positioning technology is used to calculate the position estimation of the terminal, so that when performing the location estimation of the unknown terminal, the single base station triangulation is not used for all situations.
  • FIG. 1 is a schematic flow chart of implementing a positioning method according to an embodiment of the present invention
  • FIG. 2 is a schematic structural diagram of a reference model for implementing a positioning method in a 2G network according to an embodiment of the present invention
  • FIG. 3 is a schematic flowchart of a method for implementing a positioning in a 2G network according to an embodiment of the present invention
  • FIG. 4 is a schematic structural diagram of a reference model for implementing a positioning method in a 3G network according to an embodiment of the present invention
  • FIG. 5 is a schematic flowchart of a method for implementing a positioning in a 3G network according to an embodiment of the present invention
  • FIG. 6 is a schematic structural diagram of a reference model for implementing a positioning method in a CDMA network according to an embodiment of the present invention
  • FIG. 7 is a schematic flowchart of a method for implementing a positioning in a CDMA network according to an embodiment of the present invention
  • FIG. 8 is a schematic structural diagram of a positioning server according to an embodiment of the present invention.
  • the invention is mainly applied to a cell-based cellular network such as a 2G network, a 3G network, a CDMA network, an LTE network, a WiMAX network, a WiFi network, etc.
  • a cell-based cellular network such as a 2G network, a 3G network, a CDMA network, an LTE network, a WiMAX network, a WiFi network, etc.
  • the basic idea is: when the distance between the at least one neighboring base station and the serving base station is less than or equal to When the preset base station distance threshold is used, or when the distance between all neighboring base stations and the serving base station is greater than a preset base station distance threshold, and the terminal is close to the serving base station, the single base station positioning technology is used to calculate the terminal. Location estimate.
  • FIG. 1 is a schematic flowchart of a positioning method according to an embodiment of the present invention. As shown in FIG. 1, the method includes the following steps:
  • Step 101 Calculate the distance between each neighboring cell and the serving base station, and determine whether there is a distance between the at least one neighboring cell and the serving base station is less than or equal to a preset base station distance threshold. If not, go to step 102. If yes, go to step 103;
  • the location server calculates a distance between each neighboring cell and the serving base station, and determines whether there is a distance between the at least one neighboring cell and the serving base station that is less than or equal to a preset base station distance threshold. If no, perform the step. 102. If yes, go to step 103; the positioning server in the 2G network and the 3G network is the SMLC (Serving Mobile Location Centre), and the positioning server of the CDMA network is the mobile positioning center (MPC, Mobile Positioning Center ).
  • SMLC Serving Mobile Location Centre
  • MPC Mobile Positioning Center
  • Step 102 determining whether the terminal is close to the serving base station, if yes, performing step 103, if no, performing step 104;
  • the positioning server determines whether the terminal and the serving base station are close to each other. If yes, go to step 103. If no, go to step 104.
  • Step 103 Calculate a location estimation of the terminal by using a single base station positioning technology.
  • the positioning server calculates the location estimation of the terminal by using a single base station positioning technology according to the positioning measurement information of the terminal sent by the controller;
  • the controller in the 2G network and the CDMA network is a base station controller (BSC, Base Station Controller), 3G network.
  • the controller in the middle is the Radio Network Controller (RNC)
  • Step 104 Calculate a location estimation of the terminal by using a multi-base station triangulation technology
  • the positioning server calculates the location estimation of the terminal by using the multi-base station triangulation technology according to the positioning measurement information of the terminal collected by the controller;
  • the location of the terminal is estimated to be prior art and will not be described here.
  • FIG. 2 is a schematic structural diagram of a reference model for implementing a positioning method in a 2G network according to an embodiment of the present invention. If an enhanced cell ID positioning technology is to be implemented in a 2G network, it is generally required to use the reference model.
  • the LCS client is the requester of the network side to initiate the positioning service process.
  • the Gateway Mobile Location Center (GMLC, Gateway Mobile Location Center) is responsible for positioning the control and authentication of the service process; LCS client and GMLC
  • the inter-interface is an interface for the positioning service provided by the mobile communication carrier, and uses the Mobile Location Protocol (MLP) defined by the OMA organization to carry the positioning request message and the response message; the GMLC passes the signaling interface and the attribution of the core network.
  • MLP Mobile Location Protocol
  • the location register HLR, Home Location Register
  • the interface between GMLC and HLR, GMLC and MSC, HLR and MSC is defined in the 3GPP specifications, for example, TS23.271 and TS29.002 specifications.
  • FIG. 3 is a schematic flowchart of a method for implementing positioning in a 2G network according to an embodiment of the present invention. As shown in FIG. 3, the method includes the following steps:
  • Step 301 The BSC sends the positioning measurement information of the terminal to the SMLC.
  • the terminal can measure the positioning measurement information in real time.
  • the BSC can collect a sufficient number of positioning measurement information, and send the collected positioning measurement information to the SMLC through the positioning request message; or, when the terminal is in the terminal In the idle state, the BSC does not collect the positioning measurement information temporarily.
  • the SMLC sends a message to the BSC, requesting the BSC to measure the positioning measurement information of the terminal, and after receiving the request, the BSC measures the positioning measurement information of the terminal, and the positioning of the measurement is performed.
  • the measurement information is sent to the SMLC through a positioning request message;
  • Step 302 The SMLC calculates a distance between each neighboring base station and the serving base station, and determines whether there is a distance between the at least one neighboring base station and the serving base station that is less than or equal to a preset base station.
  • the distance threshold if no, step 303 is performed, and if yes, step 304 is performed;
  • the SMLC obtains latitude and longitude data of all related base stations according to the existing base station data, the identifier of the serving base station, and the identifier of the neighboring base station in the GSM system of the 2G network; wherein, the base station data includes the correspondence between the identifier of each base station and the latitude and longitude data. Relationship; If the latitude and longitude data is a latitude and longitude value in the geodetic coordinate system, the latitude and longitude values in the geodetic coordinate system can be converted to the coordinate values in the Cartesian coordinate system by the conversion formula, and then calculated using the coordinate values in the Cartesian coordinate system. The distance between each neighboring base station and the serving base station;
  • the SMLC sorts the calculated distances and starts from the minimum distance, and compares the distance between the neighboring base station and the serving base station with the base station distance threshold.
  • the base station distance threshold is in the SMLC according to the accuracy of the multi-base station triangulation technique.
  • the base station distance threshold is 100 meters or 200 meters; once the distance between the neighboring base station and the serving base station is greater than the base station distance threshold Then, the judgment is stopped; otherwise, the judgment is not stopped; if the distance between the at least one neighboring base station and the serving base station is less than or equal to the base station distance threshold, step 304 is performed; if all the neighboring base stations and the serving base station are If the distance between the two is greater than the base station distance threshold, step 303 is performed.
  • Step 303 the SMLC determines whether the terminal is close to the serving base station according to the positioning measurement information, if yes, step 304 is performed, if no, step 305 is performed;
  • the SMLC determines whether the terminal and the serving base station are close to each other according to the field strength measurement value and the signal quality of the serving base station in the positioning measurement information; for example, when the bit error rate of the signal quality is about 0.1%, and the serving base station When the field strength measurement value is greater than -55 dBm, the SMLC determines that the terminal is close to the serving base station;
  • the SMLC determines, according to the field strength measurement value of the serving base station in the positioning measurement information, whether the terminal is close to the serving base station; for example, when the field strength measurement value of the serving base station is greater than -50 dBm, the SMLC determines the terminal and the serving base station. Close to each other;
  • the SMLC judges according to the TA value in the positioning measurement information and the field strength measurement value of the serving base station. Whether the terminal is close to the serving base station; for example, when the TA value is equal to 0 and the field strength measurement value of the serving base station is greater than -60 dBm, the SMLC determines that the terminal is close to the serving base station; or, when the TA value is equal to 1 .
  • the SMLC determines that the terminal and the serving base station are close to each other;
  • step 304 is performed; when the foregoing conditions are not met, the SMLC determines that the terminal and the serving base station are not close to each other, and step 305 is performed;
  • the measured value, signal quality, and TA value can be adjusted according to the actual situation.
  • Step 304 The SMLC calculates a location estimation of the terminal by using a single base station positioning technology according to the received positioning measurement information.
  • the SMLC uses a single base station positioning technology to perform location estimation of the terminal, that is, the identifier of the existing serving base station in the GSM system is added to the parameter related to the serving base station in the positioning measurement information and the pre-inputted serving cell in the GSM system.
  • Data the above three types of data are added to obtain a position estimation of the terminal; wherein, the parameters related to the serving base station include an AT value, a field strength measurement value of the serving base station, and a signal quality; and the related data of the serving cell includes the middle of the cell coverage area.
  • Step 305 The SMLC calculates a location estimation of the terminal by using a multi-base station triangulation technology according to the received positioning measurement information.
  • FIG. 4 is a schematic structural diagram of a reference model for implementing a positioning method in a 3G network according to an embodiment of the present invention. If an enhanced cell ID positioning technology is to be implemented in a 3G network, for example, a WCDMA system of a 3G network.
  • the Cell ID+RTT positioning technology or the Cell ID+TA positioning technology in the TD-SCDMA system usually uses this reference model; as shown in Figure 4, the LCS client, GMLC, HLR, MSC, SGSN and other network elements Function and Similar to the reference model of the 2G network, the interface between them is similar to the corresponding interface in the reference model of the 2G network; through the interface with the HLR, the GMLC obtains the current routing information of the terminal, and can pass the MSC/SGSN After the MSC/SGSN receives the location request, the MSC/SGSN forwards the request to the access network through the interface between the RNC and the RNC. The RNC can further forward the location request and the location measurement information to the SMLC through the Iupc interface. The position estimate of the terminal is calculated by the SMLC.
  • FIG. 5 is a schematic flowchart of implementing a positioning method in a 3G network according to an embodiment of the present invention. As shown in FIG. 5, the method includes the following steps:
  • Step 501 The RNC sends the positioning measurement information of the terminal to the SMLC.
  • the RNC initiates a measurement control request to the terminal, and the requesting terminal provides a time difference measurement parameter RxTx, which is used to convert the signal propagation time between the terminal and the serving base station; the RNC initiates a measurement control request to the NodeB, requesting the NodeB to provide a round-trip delay ( RTT, Round Trip Time) parameter, which is used to calculate the signal propagation time between the terminal and the serving base station in combination with the RxTx provided by the terminal, and further convert the distance between the terminal and the serving base station; the interaction between the RNC and the NodeB The signal quality and other measurement results can also be obtained; the RNC sends the obtained information as positioning measurement information to the SMLC through the Iupc interface;
  • RTT Round Trip Time
  • Difference Type 1 is mutually exclusive and can only be measured and compared to the serving base station and the neighbor base station in the active set.
  • the processing time from the transmission of the downlink radio signal frame to the reception of the terminal uplink radio signal frame by the NodeB is 0.0625chip, and the processing time needs to add 876chips to indicate the actual measured loopback time.
  • the distance between the terminal and the serving base station can be expressed as
  • Step 502 The SMLC calculates a distance between each neighboring base station and the serving base station, and determines whether there is a distance between the at least one base station and the serving base station that is less than or equal to a preset base station distance threshold. If not, step 503 is performed. Yes, step 504 is performed; Specifically, the SMLC obtains latitude and longitude data of all relevant base stations according to the existing base station data, the identifier of the serving base station, and the identifier of the neighboring base station in the UMTS system of the 3G network; wherein, the base station data includes the identifier and latitude and longitude data of each base station.
  • the positioning measurement information includes the three-dimensional position coordinates of the base station antenna, it does not need to rely on the base station data of the UMTS system; if the latitude and longitude data is the latitude and longitude value in the geodetic coordinate system, the geodetic coordinate system can be converted by the formula Converting the latitude and longitude values into coordinate values in the Cartesian coordinate system, and then calculating the distance between each neighboring base station and the serving base station using the coordinate values in the Cartesian coordinate system;
  • the SMLC sorts the calculated distances and starts from the minimum distance, and compares the distance between the neighboring base station and the serving base station with the base station distance threshold.
  • the base station distance threshold is in the SMLC according to the accuracy of the multi-base station triangulation technique.
  • the base station distance threshold is 100 meters or 200 meters; once the distance between the neighboring base station and the serving base station is greater than the base station distance threshold Then, the judgment is stopped; otherwise, the judgment is not stopped; if the distance between the at least one neighboring base station and the serving base station is less than or equal to the base station distance threshold, step 504 is performed; if all the neighboring base stations and the serving base station are If the distance between the two is greater than the base station distance threshold, step 503 is performed.
  • Step 503 the SMLC determines whether the terminal is close to the serving base station according to the positioning measurement information, if yes, step 504 is performed, if no, step 505 is performed;
  • the SMLC determines whether the terminal and the serving base station are close to each other according to the signal level and the signal to noise ratio of the serving base station in the positioning measurement information; for example, when the value of the signal to noise ratio is above 48, and the signal of the serving base station is When the flat value is greater than 80, the SMLC determines that the terminal is close to the serving base station;
  • the SMLC determines, according to the signal level of the serving base station in the positioning measurement information, whether the terminal is close to the serving base station; for example, when the signal level value of the serving base station is greater than 85, the SMLC determines that the terminal and the serving base station are Close range
  • the SMLC according to the distance and service between the terminal and the serving base station in the positioning measurement information
  • the signal level value of the base station determines whether the terminal is close to the serving base station; for example, when the distance between the terminal and the serving base station is less than 150 meters, and the signal level value of the serving base station is greater than 75, the SMLC determines the terminal and the service. Close range between base stations;
  • the SMLC determines, according to the distance between the terminal to the serving base station in the positioning measurement information, the signal level of the serving base station, and the signal level of the neighboring base station, whether the terminal is close to the serving base station; for example, when the terminal is in service When the distance between the base stations is less than 200 meters, and the signal level value of the serving base station is greater than 80, and the signal level value of the neighboring base station with the strongest signal is less than 30, the SMLC determines that the terminal is close to the serving base station;
  • step 504 is performed; when the foregoing conditions are not met, the SMLC determines that the terminal is not close to the serving base station, and performs step 505;
  • the level, the signal-to-noise ratio, the distance between the terminal to the serving base station, and the threshold of the signal level of the neighboring base station can be adjusted according to actual conditions.
  • Step 504 The SMLC calculates a location estimate of the terminal by using a single base station positioning technology according to the received positioning measurement information.
  • the SMLC uses a single base station positioning technology to perform location estimation of the terminal, that is, the identifier of the existing serving base station in the UMTS system is added to the parameter related to the serving base station in the positioning measurement information and the pre-inputted serving cell in the UMTS system.
  • Data the foregoing three types of data are added to obtain a location estimation of the terminal; wherein, the parameters related to the serving base station include a distance between the terminal and the serving base station, a signal level of the serving base station, and a signal to noise ratio; and the related data of the serving cell includes The angle between the central axis of the cell coverage area and the true north direction, the opening angle of the cell coverage area, the radius of the cell coverage area, and the like.
  • Step 505 The SMLC calculates a location estimation of the terminal by using a multi-base station triangulation technology according to the received positioning measurement information.
  • FIG. 6 is a CDMA network according to an embodiment of the present invention.
  • the function is similar to that in the reference models of the above two positioning technologies; wherein the implementation form of the L1 interface between the LCS client and the MPC, and the implementation of the Le interface between the GMLC and the LCS client in the above two embodiments
  • the MPU can obtain the current routing information of the terminal through the interface with the HLR, and can initiate a positioning request through the interface with the MSC; after receiving the positioning request, the MSC can connect it through the interface with the BSC.
  • the BSC can further return the parameters collected by the pilot energy measurement report for the handover decision reported by the terminal to the MSC; the MSC then sends the parameters in the measurement report to the MPC through the return message, and the MPC calculates The location estimate of the terminal.
  • FIG. 7 is a schematic flowchart of a method for implementing positioning in a CDMA network according to an embodiment of the present invention. As shown in FIG. 7, the method includes the following steps:
  • Step 701 The MSC sends the positioning measurement information of the terminal to the MPC.
  • the BSC initiates a measurement control request to the terminal, requesting the terminal to provide a pilot energy measurement report; the BSC sends the parameter in the pilot energy measurement report obtained by the terminal to the MSC, and the MSC uses the parameter in the pilot energy measurement report as a terminal.
  • the positioning measurement information is sent to the MPC through a return message;
  • CDMA Target One Way is similar to CDMA Serving One Way Delay. Delay is also reported in 100ns or 1/8 chip.
  • the mobile station detects the received pilot strength of different base stations, which actually corresponds to Ec/IO; the parameter is in the range of -0.5dB, and the value range is 1 ⁇ 63.
  • Step 702 The MPC calculates the distance between each neighboring cell and the serving base station, and determines whether the distance between the at least one neighboring cell and the serving base station is less than or equal to a preset base station distance threshold. If not, step 703 is performed. If yes, go to step 704;
  • the MPC obtains the latitude and longitude data of all the relevant base stations according to the existing base station data, the identifier of the serving base station, and the identifier of the neighboring base station in the CDMA system; wherein, the base station data includes the correspondence between the identifier of each base station and the latitude and longitude data; If the latitude and longitude data is a latitude and longitude value in the geodetic coordinate system, the latitude and longitude values in the geodetic coordinate system may be converted into coordinate values in the Cartesian coordinate system by a conversion formula, and then each of the coordinate values in the Cartesian coordinate system is used to calculate each The distance between the neighboring base station and the serving base station;
  • the MPC sorts the calculated distances and starts from the minimum distance, and compares the distance between the neighboring base station and the serving base station with the base station distance threshold.
  • the base station distance threshold is in the MPC according to the accuracy of the multi-base station triangulation technology. If the limit is preset, for example, the lower limit of accuracy of the multi-base station triangulation technology is 100 meters or 200 meters, the base station distance threshold is 100 meters or 200 meters; once the distance between the neighboring base station and the serving base station is greater than the base station distance threshold Then, the judgment is stopped; otherwise, the judgment is not stopped; if the distance between the at least one neighboring base station and the serving base station is less than or equal to the base station distance threshold, step 704 is performed; if all the neighboring base stations and the serving base station If the distance between the two is greater than the base station distance threshold, step 703 is performed.
  • Step 703 The MPC determines, according to the positioning measurement information, whether the terminal and the serving base station are close to each other. Distance, if yes, go to step 704, if no, go to step 705;
  • the MPC determines, according to the pilot strength of the serving base station in the positioning measurement information, whether the terminal is close to the serving base station; for example, when the value of the pilot strength of the serving base station is greater than 60, the MPC determines the terminal and the serving base station. Close to each other;
  • the MPC determines, according to the distance from the terminal to the serving base station that is converted according to the CDMA Serving One Way Delay parameter in the positioning measurement information, and the pilot strength of the serving base station, whether the terminal is close to the serving base station; for example, when the terminal is in service When the distance of the base station is less than 150 meters, and the value of the pilot strength of the serving base station is greater than 55, the MPC determines that the terminal is close to the serving base station;
  • step 704 is performed; when the foregoing conditions are not met, the MPC determines that the terminal and the serving base station are not close to each other, and step 705 is performed; The strength and the distance from the terminal to the serving base station can be adjusted according to the actual situation.
  • Step 704 The MPC calculates a location estimation of the terminal by using a single base station positioning technology according to the received positioning measurement information.
  • the MPC uses a single base station positioning technology to perform location estimation of the terminal, that is, the identifier of the existing serving base station in the CDMA system is added to the parameter related to the serving base station in the positioning measurement information and the pre-inputted serving cell in the GSM system.
  • Data the foregoing three types of data are added to obtain a location estimation of the terminal; wherein, the parameters related to the serving base station include a distance between the terminal and the serving base station, a pilot strength of the serving base station, and the like; and the related data of the serving cell includes the cell coverage area.
  • Step 705 The MPC calculates a location estimation of the terminal by using a multi-base station triangulation technology according to the received positioning measurement information.
  • FIG. 8 is an implementation of the present invention.
  • the first computing module 82 wherein
  • the determining module 81 is configured to separately calculate a distance between each neighboring base station and the serving base station, and determine whether there is a distance between the at least one neighboring base station and the serving base station is less than or equal to a preset base station distance threshold; when all neighboring areas When the distance between the base station and the serving base station is greater than a preset base station distance threshold, it is determined whether the terminal is close to the serving base station;
  • the first calculating module 82 is configured to: when the determining module 81 determines that the distance between the at least one neighboring base station and the serving base station is less than or equal to a preset base station distance threshold, or when the determining module 81 determines all neighboring base stations and the serving base station When the distance between them is greater than the preset base station distance threshold, and the terminal is close to the serving base station, the location estimation of the terminal is calculated by using a single base station positioning technology.
  • the location server also includes:
  • the second calculating module 83 is configured to use the multiple base stations when the determining module 81 determines that the distance between all neighboring base stations and the serving base station is greater than a preset base station distance threshold, and the terminal and the serving base station are not close to each other.
  • the triangulation technique calculates the positioning estimate of the terminal.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Position Fixing By Use Of Radio Waves (AREA)

Abstract

L'invention porte sur un procédé de localisation et un serveur de localisation. Le procédé comprend les opérations suivantes : lorsque la distance entre au moins une station de base dans une cellule adjacente et une station de base de desserte est inférieure ou égale à un seuil préréglé de distance de station de base, ou lorsque les distances entre toutes les stations de base dans des cellules adjacentes et la station de base de desserte sont toutes supérieures au seuil préréglé de distance de station de base et un terminal se trouve à proximité immédiate de la station de base de desserte, une technologie de localisation par station de base unique est adoptée afin de calculer une estimation de position du terminal. Conformément à la solution technique de l'invention, l'estimation de position du terminal peut être réalisée plus précisément.
PCT/CN2011/072057 2010-09-28 2011-03-22 Procédé de localisation et serveur de localisation WO2012041045A1 (fr)

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CN101965051A (zh) * 2010-09-28 2011-02-02 中兴通讯股份有限公司 一种定位方法及定位服务器
CN102769855B (zh) * 2011-05-05 2014-12-10 中国移动通信集团北京有限公司 一种确定邻区的方法及装置
CN102413565A (zh) * 2011-12-06 2012-04-11 大唐移动通信设备有限公司 一种终端位置的确定方法和设备
CN103249138B (zh) * 2012-02-03 2016-06-15 中国电信股份有限公司 定位方法与装置
CN102706356B (zh) * 2012-05-29 2017-03-15 中兴通讯股份有限公司 一种路径导航的方法、基站、核心网和系统
CN105578404B (zh) * 2014-10-17 2021-05-11 中兴通讯股份有限公司 一种定位方法及相应的终端、系统
CN104540099A (zh) * 2014-12-31 2015-04-22 京信通信系统（中国）有限公司 一种终端定位方法及演进的服务移动位置中心
CN106371058A (zh) * 2015-07-23 2017-02-01 富士通株式会社 定位装置及定位方法
CN107404566B (zh) * 2016-05-19 2020-05-12 中国移动通信集团设计院有限公司 一种终端场景判断方法及装置
CN106597364B (zh) * 2016-11-18 2019-05-24 烟台职业学院 一种单天线单站无源定位的目标辐射源初始位置估计方法
CN108924925A (zh) * 2018-07-09 2018-11-30 上海公路桥梁（集团）有限公司 一种施工人员定位方法及其定位系统
CN114143703A (zh) * 2020-08-14 2022-03-04 中国移动通信有限公司研究院 定位门限参数配置的方法、定位方式指示的方法及设备
CN115022960A (zh) * 2021-02-19 2022-09-06 大唐移动通信设备有限公司 位置识别方法、装置及处理器可读存储介质

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